I believe the artist on the this Satsuma model of Benton is Shuzan, I would like to know what the characters on the bottom mean, not numbers as far as I can figure, thanks in advance for your help, corrections as well

The mark reads: Dai 大 Nippon 日本 (Great Japan) Satsuma 薩广 Kizan 琪山.
Satsuma with an abbreviated Kanji character for "Ma", normally 摩.
Kizan is the maker. Late Meiji Satsuma, circa 1900. He seems to have had a studio or trading firm called Meigado 明雅堂, because there are marks on Satsuma ware with the Meigado and Kizan names.
See another mark of this Kizan below.

The other signature spells Setsuo 雪汚, probably the painter / decorator, but I have no information about this artist.
All names are in Sino-Japanese ON-reading.
Regards,
Martin.